This Tokina SZ 900mm f/11 Pro Reflex MF CF Lens features a unique catadioptric optical design. This Sony E mount, lens is well-suited for travel, wildlife, and outdoor photography. It offers a fixed f/11 aperture that is compatible with select camera focus peaking systems and in-body multi-axis image stabilization systems. Advanced optical design suppresses chromatic aberrations, lens flare, and ghosting. 270° focus rotation angle allows precise focusing operations with a shallow depth of field Rendering everyday scenery in a dramatic and iconic manner. this telephoto lens also offers distinct doughnut-shaped bokeh rings.